refactor form error handling: * almost everything is in the base form class, with other form errors related code * deprecate form_field_error in favor of field_error and format_error on the renderer * fix pb with js localization of errors by properly using field.role_name() * rename 'errors' into 'error' in forminfo to avoid confusion

[system]

db-driver   = sqlite
db-host     = 
adapter     = native
db-name     = tmpdb
db-encoding = UTF-8
db-user     = admin
db-password = gingkow

[admin]
login = admin
password = gingkow